How to make a video pause when a calayer appears - swift

Question

I am trying to make a calayer pause the video when it appears. I do not know how to go about doing this whether I add it as another calayer or animation. Here is my code when I add the calayer before exporting it. So when the animation happens I would like to have the video pause when it appears and then resume once the animation stops.
let titleLayer = CATextLayer()
titleLayer.backgroundColor = NSColor.clearColor().CGColor
titleLayer.string = "Dummy text"
titleLayer.font = NSFont(name: "Helvetica", size: 28)
titleLayer.shadowOpacity = 0.5
titleLayer.alignmentMode = kCAAlignmentCenter
titleLayer.frame = CGRectMake(0, 50, size.width, size.height / 6)
let animation: CABasicAnimation = CABasicAnimation(keyPath: "opacity")
animation.duration = 0
animation.fromValue = Int(1.0)
animation.toValue = Int(0.0)
animation.beginTime = 5
animation.removedOnCompletion = false
animation.fillMode = kCAFillModeForwards
titleLayer.addAnimation(animation, forKey: "animateOpacity")

Answer 1

You can pause the video before you add your animation to the layer and then resume it when the animation finishes. To know when the animation finishes, you can have an object be a delegate of animation and then resume playback in the animationDidStop:finished: delegate method.
func showTitle() {
// configure animation { .. }
animation.delegate = self
// pause video
titleLayer.addAnimation(animation, forKey: "animateOpacity")
}
func animationDidStop(anim: CAAnimation, finished flag: Bool) {
// play video
}